Clarifying the surface dynamics of glass

Tian et al. summarized research investigating the surface dynamics of glasses, a topic relevant to materials science, condensed matter physics, and polymer science that is not yet entirely understood.

The dynamics of molecules at the surface of glass are more mysterious than the dynamics in the bulk material. Recent work has determined that the surface of glass exhibits higher molecular mobility than its bulk. The authors highlighted this finding, known as enhanced surface mobility, and discussed related experiments and theories.

“To highlight the significance of enhanced surface mobility and introduce this concept to applied physics communities, we provided a comprehensive summary of this concept, characterization, theoretical modeling, and unique features of dynamics at the surfaces of glasses,” said author Biao Zuo. “This demonstrates potential advantages of incorporating this concept into designing improved materials with extraordinary properties.”

Enhanced surface mobility has furthered understanding of glass dynamics and could improve the design and production of glasses for applications such as pharmaceuticals, optical fibers, metallic alloys, and computer chips. A better understanding of the dynamics of glass surfaces could also help control surface phenomena associated with nanoscale devices, which are mostly made up of surface molecules.

“This review paper is helpful for scientists and engineers to gain a comprehensive, up-to-date

understanding of surface dynamics of glassy materials, and help them to devise new

methods and approaches to control, manufacture and fabricate materials and devices with

extraordinary properties,” said author Rodney Priestley.

The authors hope the mechanism underlying the unique behavior observed at the surface of glasses is fully clarified soon and expect their review to help solve this mystery.

Source: “Surface dynamics of glasses,” by Houkuan Tian, Quanyin Xu, Haiyang Zhang, Rodney D. Priestley, and Biao Zuo, Applied Physics Reviews (2022). The article can be accessed at https://aip.scitation.org/doi/full/10.1063/5.0083726 .